The installation is finished, Almost according to plans. The power supply cables had to be changed after the initial installation. I used a cable dimension approximtely equal to the short one supplied on the calorifier. Too thin. The power supply cable from the circuit breaker box is around 3 meters long, and it got warm (not hot) when power was switched on. This of course means an energy loss, and new cables, believed to be around 10mm2 was installed. That was much better.
And speaking about energy, an effort is made to save every Joule possible. The picture shows the extra insulation laid around metal parts (tubing connections) that leak heat from the water in the tank.
From quite cold water it took more than one and a half hour to heat up the tank. Less now that the summer has arrived. Calculating from a 25A consumption and 1 1/2 hrs, this means around 40Ah spent. The first testing period has been very sunny and also given some wind, thus the surplus energy I mentioned in the previous post has been present. And the heater has been used every day. It would have been nice to have Lithium batteries, then I could have "borrowed" more power on overcast days without being concerned about recharging lead batteries.
But the amount of well heated water is quite limited. All such tanks take in cold water for pressure in the bottom, and as the tank is small, it seems to mix in fairly rapidly. Still, it is nice to have some hot tap water for rinsing the greasy frying pans and pots. Warmed by surplus energy otherwise not available for use.
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